I think this should do:
<?php
/********* Export to csv ***********/
add_action('admin_footer', 'mytheme_export_users');
function mytheme_export_users() {
$screen = get_current_screen();
if ( $screen->id != "users" ) // Only add to users.php page
return;
?>
<script type="text/javascript">
jQuery(document).ready( function($)
{
$('.tablenav.top .clear, .tablenav.bottom .clear').before('<form action="#" method="POST"><input type="hidden" id="mytheme_export_csv" name="mytheme_export_csv" value="1" /><input class="button button-primary user_export_button" style="margin-top:3px;" type="submit" value="<?php esc_attr_e('Export All as CSV', 'mytheme');?>" /></form>');
});
</script>
<?php
}
add_action('admin_init', 'export_csv'); //you can use admin_init as well
function export_csv() {
if (!empty($_POST['mytheme_export_csv'])) {
if (current_user_can('manage_options')) {
header("Content-type: application/force-download");
header('Content-Disposition: inline; filename="users'.date('YmdHis').'.csv"');
// WP_User_Query arguments
$args = array (
'order' => 'ASC',
'orderby' => 'display_name',
'fields' => 'all',
);
// The User Query
$blogusers = get_users( $args );
// Array of WP_User objects.
foreach ( $blogusers as $user ) {
$meta = get_user_meta($user->ID);
$role = $user->roles;
$email = $user->user_email;
$first_name = ( isset($meta['first_name'][0]) && $meta['first_name'][0] != '' ) ? $meta['first_name'][0] : '' ;
$last_name = ( isset($meta['last_name'][0]) && $meta['last_name'][0] != '' ) ? $meta['last_name'][0] : '' ;
echo '"' . $first_name . '","' . $last_name . '","' . $email . '","' . ucfirst($role[0]) . '"' . "\r\n";
}
exit();
}
}
}
The first part will add a button to the table navigation in header and footer of the users table. When you click it you'll call the export_csv() function that is below. You can customize it to your liking of course.
Hope this helps :)
